<md-toolbar layout="row">
    <div class="md-toolbar-tools">
        <!--<md-button ng-click="click()">-->
        <!--<md-icon class="material-icons">keyboard_backspace</md-icon>-->
        <!--</md-button>-->
        <h1 flex="noshrink" >
            <span  ng-click="aboutInfo()">
            <md-icon class="md-secondary material-icons">call_to_action</md-icon>
            就叫课堂</span>
        </h1>
        <md-button ng-click="updatePwd()">
            <md-icon class="md-secondary material-icons">build</md-icon>
            <span>修改资料</span>
        </md-button>
        <md-button ng-click="logout()">
            <md-icon class="md-secondary material-icons">power_settings_new</md-icon>
            <span>登出</span>
        </md-button>

    </div>
</md-toolbar>


<style>
    md-toolbar {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
    }
</style>